Engraving-machine.



S. CLARK.

ENGRAVING MACHINE.

APPLICATION FILED MAR. N, 191 5.

Patented Apr. 25, 1916.

I 2 shims-sham 1.

INVE/I/TOR Samuel Clark W Go 4 TTOR/VEYS S. CLARK.

ENGRAVING MACHINE.

APPLICATION men MAR. 11. 1915.

Patented Apr. 25, 1916.

2 SHEETS-SHEET 2.

WN/// W INVENTOI? Samuel Clark Wlf/VESSES A TTOR/l/EYS SAMUEL CLARK, OF JERSEY CITY, NEW JERSEY.

ENGRAVING-IVIACHINE.

Application filed March 17, 1915.

To all whom it may concern Be it known that I, SAMUEL CLARK, a citizen of the United States, and a resident of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Engraving-Machine,of which the following is a full, clear, and exact description.

My invention relates to engraving machines, and has reference more particularly to a machine characterized by a needle arm having a universal movement resulting from contacting roller surfaces and a transmitter mounted to roll on ball bearings.

The object of the invention is to provide a simple, compact, strong and inexpensive engraving machine in which all lost motion is reduced to a minimum, whereby work of better quality is obtained, in which machine there is a direct interaction between the stylus point and the needle point, and which machine can be easily and quickly adapted to various classes of work.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in the novel construction, combination and arrangement of parts as herein fully described, illustrated and claimed.

In the accompanying drawings, forming part of the application, similar characters of reference indicate corresponding parts in all the views. I

Figure 1 is a side elevation of my machine; Fig. 2 is a front elevation thereof; Fig. 3 is a plan view of the work bed and the needle-carrying frame cooperating therewith; Fig. 41 is a horizontal section on line 1-4, Fig. 1; Fig. 5 is a perspective view of the needle arnrcarrying frame; and Fig. 6 is a section of the worktable and bed there of on line (i -6, Fig. 1.

Referring to the drawings, 5 represents the table of the frame which is provided with a pattern-holder 6 adapted to accommodate and properly retain the work to be reproduced. Mounted on the table 5 is a pair of standards 7 engaged by a frame 8 which can be moved on the standards 7 by means of a rack and pinion 10. A portion of the Specification of Letters Patent.

Patented Apr. 25, 1916.

Serial No. 15,098.

frame engaging the standards is split and provided with clamping screws 11 so that the same can be locked to the standards at any desired position.

Projecting from the frame 8 is a bracket 12 which overhangs the pattern-holder 6; Mounted to oscillate in the bracket is a ring 13, the convex surface of which has two diametrically opposite bearing recesses engaged by adjustable studs 14 carried in the bracket. The ring 13 carries a pair of alining studs 15 threaded in the ring 13 at right angles to the bearing recesses of the ring engaged by the studs 1 1 of the bracket 12. Engaging each of the bearing studs 15 is a shoe 16 having a V-shaped way 17 parallel to the axis of the ring and facing similarlyshaped ways 18 provided in a transmitter 19 which passes through the ring and which is axial therewith. Positioned intermediate the ways 17 and 18 are balls 20 which are maintained at the end of the way 17 of the shoe 16 by pins 20 or any other suitable means. By providing balls 20 between each shoe and the side of the transmitter, the ad justing studs 15 can be screwed tight against the shoes, thus eliminating any play of the transmitter in its bearing without any ap preciable increase in friction of the transmitter in its bearing. The lower end of the transmitter terminates in av sleeve 19 hav ing an end slot traversed by a clamping screw 21, whereby the bore of the sleeve 19' can be contracted. Engaging the bore of the sleeve and passing into the frame is a stylus bar 2-2 carrying a stylus 23 at its lower end, with which. the pattern located in the holder 6 is followed. The stylus bar adjacent the lower end thereof is provided with a hand grip 24 whereby the bar can be easily manipulated in following out the pattern. The upper end of the transmitter has a pair of alined bearing screws 25 adj ustably mounted therein. The said. screws are in a plane with the bearing studs 15 carried by the ring. Bearing on said screws 25 with its central part is an elongated frame 26, the longitudinal axis of which frame is at right angles to the bearings thereof. Rollers 27 are mounted within the frame 26, to each' arm carrier 28 is at right angles to the axis of oscillation of the frame 26 on the transmitter. I

Secured a'dgustably to the arm'carrier 28 is a needle arm 29 which carries a needle 30.

; Thearm has a longitudinal slot 29 engaged by a butterfly-head screw 42by which-the rim is clamped to the carrier. The'arm 29 overhangs a work table 31 which is carried by the standards 7. This table has facing extensions 32 forminga supportv for facing rollers 33 which are engaged by the correspndingrollers 27 (see Fig. 3). The work table 31 is provided with raised portions 31 forming ways for. the work bed 34 mounted to slide to and from the frame 26, means'll being provided in a portion 31 for clamping the bed at any desired position. The needle is maintained clear of the working table by the engagement of a lifting arm 35 with the needle bar '29 (see Fig. The lifting arm 35 is connected by means of a rod 36 to a foot pedal 37 which is maintained in raised'positionby a spring 38 engaging a collar 39 provided on the rod36. 'By pressing the pedal the needle is brought into engagement with the work carried by the work bed 34.

The operation of my machine is as follows: A given design to be reproduced is placed into the pattern holder 6. The stylus is placedfion the pattern. The frame 8 is adjusted'on the standard to obtain the desired size of reproduction at the needle point. The proper length of arm 29 is then extended from the arm carrier 28 toward the work-bed 3%, the length of arm depending on the work to be reproduced. By pressing the pedal the needle is brought in contact with the work, and by following the pattern with the stylus the needle will reproduce the same. It'matters notwhether the work is flat, curved or uneven, as the needle will always be in contact with the work under the action of gravity. hen the work is to be reproduced on stone, a greater extension 40 is interposed between the arm support 28 and the arm 29, (see Fig. 1,) so as to raise said arm sufliciently above the work bed 34: to admit the stone. To rule, a plate is fastened to the work bed, preferably by means of wax. The work bed is free to slide in the table 31, and by alternately moving the bed and displacing the stylus bar into'successive' dots on a ruling pattern, the ruling results... It is self-evidentthat during the displacement of the bed the pedal must be depressed.

It will be noted that by providing rollers 27 and 33 a universal movement is given to the frame '26 by the movement of the transmitter, the inter-rolling action of the rollers reducing the friction during the movement .to a mlnnnum. The provision of the balls between the-shoes 16'-an'd the transmitter 19 .permitsthe transmitter to roll in the shoes while the "same is operated, that is, the normal sliding friction is transformed into rolling friction. This arrangement permits the reduction of play between the transmitter and shoes without any appreciable increase in frictiontherebetween.

The elongated frame 26 is provided with a series of superimposing bearing recesses 26 engageable by the bearing screws 25 on the transmitter, thereby permitting an adjustment of the elongated frame 26 on-the transmitter'and to increase the swing 'of the top of the transmitter from side to'fside without an increasing movement forward and backward. WVhile I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrativeand that such changes maybe made as are within the scope of the appended claims.

I claim: I 1. Ina machine of the class described, a

work table, a transmitter mounted to oscil late,"a frame mounted to oscillate on the transmitter, rollers carried by the frame. rollers carried by the table and engaged by the rollers of the frame, the rollers carried by the table being disposed at right angles to the rollers carried by the frame, and a needle bar support mounted to oscillate in the frame.

2. In a machine of the class described, a

work table, a transmitter mounted to oscillate in axes at right angles to each other, an elongated frame mounted to oscillate in the transmitter in an axis at right angles to the longitudinal axis of said frame, rollers earriedby' the frame, rollers carried by the table and engaged by the rollers of the frame, the rollers of the table being disposed at right angles to the rollers of the frame, a needle-bar support mounted to oscillate on an axis parallel to an axis of oscillation of the transmitter, and a needle bar carried by said needle support and adapted to cooperate with the Work table.

3. In a machine of the class described, a transmitter, a ring mounted to oscillate encompassing the transmitter, means mounted to oscillate in the ring at right angles tothe axis of oscillation of the ring and interposed between the transmitter and the ring, and balls intermediate the means an'dtlie transright angles to each other, and ball bearings' associated .with the transmitter at the axes of oscillation permitting a longitudinal. displacement of the transmitter relative to the axes of oscillation.

5. In a machine of the class described, a. t-ra11smitter',-f a-i ring mounted to oscillate encompassing the transmitter, shoes mounted to oscillate within the ring at right angles to the axis of oscillation of the ring, and balls interposed between the shoes and the transmitter whereby the same can be moved rela tive to the axes of oscillation of the shoes and ring.

6. In a machine of the class described, a transmitter, a ring mounted to oscillate encompassing the transmitter, and ball bearings for said transmitter mounted to oscillate within the ring at right angles to the axis of oscillation of the ring, the transmitter being adapted to move on said bearings relative to the axes of oscillation of said ball bearings and ring.

7. In a machine of the class described, a standard, a frame mounted to slide on the standard and having means for locking the same to the standard at any position thereof, a bracket extending laterally from the frame, a ring mounted to oscillate in the bracket, a transmitter passing through the ring, ball bearings interposed between the transmitter and the ring, said ball bearings being mounted to oscillate in an axis at right angles to the axis of oscillation of the ring, a work table carried by the standard, an elongated frame mounted to oscillate on the transmitter in an axis at right angles to the axis of oscillation of the ring. rollers carried by said elongated frame, rollers carried by the work table at right angles to the rollers of the elongated frameand in engagement with the rollers of the elongated frame, a needle support mounted to oscillate in the elongated frame provided with the rollers in an axis at right angles to the axis of oscillation of the elongated frame, a needle bar carried by the needle support, and foot operable means normally maintaining said needle bar clear of the work table, substantially as and for the purpose set forth.

8. In a machine of the class described, a transmitter mounted to oscillate on axes at right angles to each other and slide transversely of said axes, an elongated frame mounted to oscillate on the transmitter in its central. part in an axis at right angles to the longitudinal axis of the frame, rollers carried by said frame, the axis of said rollers being in alinement with the longitudinal axis of said frame, a work table, rollers in said work table "at right angles to therollers in the frame and in engagement with the rollers of the frame, a needle arm support mounted to oscillate in the frame in an axis transverse to the axis of oscillation of the frame," an arm carried by said support, and means normally maintaining said arm clear of the table, substantially as and for the purpose set forth. 9. Ina machine of the class described, work table, a transmitter mounted to oscillate inaxes at rightlanglesto each other sand=sl1de transversely of said axes of oscillation, a frame mounted to oscillate in the transmitter roller bearings for said frame on the work table, and a needle arm support mounted to oscillate in the frame.

10. In a machine of the class described, a work table, a transmitter mounted to oscillate, a frame mounted to oscillate on the transmitter roller bearings for the frame on the table, and a needle arm support mounted to oscillate in the frame at an axis at right angles to the axis of oscillation of the frame in the transmitter.

11. In a machine of the class described, a transmitter, a ring mounted to oscillate and encompass the transmitter, shoes mounted to oscillate in the ring in an axis at right angles to the axis of oscillation of the ring, said shoes and transmitter having facing V-shaped ways, and balls engaging the said ways, whereby said transmitter is mounted to move 011 the balls in the shoes.

12. In a machine of the class described, standards, a frame mounted to slide on said standards and having means for locking said frame at any desired position on said standards, a bracket extending laterally from the frame, a ring mounted to oscillate in the bracket, a pair of shoes mounted to oscillate within the ring in an axis at right angles to the axis of oscillation of the ring, a transmitter passing through the ring, said transmitter and shoes having facing V- shaped ways, balls in said ways whereby the transmitter has ball bearings in. the shoes, an elongated frame mounted to oscillate in the central part thereof on said transmitter so that its axis of. oscillation is at right angles to the longitudinal axis of the elongated frame, rollers in said elongated frame in alinement with the longitudinal axis thereof, a work table carried by the standards, rollers in said table in engagement with the rollers of the frame and disposed at right angles thereto, a needle arm support mounted to oscillate in the elongated frame in an axis at right angles to the axis of oscillation of said elongated frame, a needle arm carried by said arm support, and footoperable means for normally maintaining said arm clear of the table, substantially as and for the purpose set forth.

13. In a machine of the class described, a

w'orkst'able," va transmitter meunted't'o oseillate; antelongat'ed 'frame mountedrto oscillate- 0n theftransmitter with its oscillating axis at rightanglestothe longitudinal axis, of :the frame,. 'said longitudinal elongated frame. having. means whereby its'axisiof oscillation in the transmitter can' be .varied so as to be above or below'the longitudinal axis of the frame, said elongated frame and 10 tableshaving means forming roller bearings for-the: frainef'on said 'bedg andaneedlebar support mounte'dnto roscillate in the elengated frame.

In 'testimonywhei'eof I have signedmy name to this specification in the presence 0* Copies of thirpa'cent mayhe obtained- 101 flve cents each, by addressing-the commissionerr ot Patents;- 7 waihington; D. 0. 

